The only recreation of William Shakespeare's indoor playhouse.

In an effort to escape the horrors of slavery, one man mailed himself to freedom.

A church now sits over the site of one of the worst urban disasters of early 19th-century America.

Natural hot springs hidden in the rainforest are only accessible by boat.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

A miniature model of what will be the world's largest telescope.

A surprisingly detailed model of one of the most powerful telescopes in the world.

A sprawling Victorian farm that has been surrounded by a capital city is one of Canada's greatest treasures.

A rare venue to buy specialty maps.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

This Toronto garden collects stares and tchotchkes in equal measure.

Secret Swing.

Money may not grow on trees, but it can be dispensed by one.

A nine-hole golf course in Pennsylvania hasn't charged a greens fee since its founding in 1914.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Home to a dizzying array of letterpress blocks with a rich history.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

Cold war icon and onetime "hole" in the iron curtain.